/*
 * Copyright 2012-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.by.basicgateway.config;

import com.by.basicgateway.intercept.exception.CustomizeErrorAttributes;
import com.by.basicgateway.intercept.exception.GlobalErrorWebExceptionHandler;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.web.ServerProperties;
import org.springframework.boot.autoconfigure.web.WebProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.boot.web.reactive.error.DefaultErrorAttributes;
import org.springframework.boot.web.reactive.error.ErrorAttributes;
import org.springframework.boot.web.reactive.error.ErrorWebExceptionHandler;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.http.codec.ServerCodecConfigurer;
import org.springframework.web.reactive.result.view.ViewResolver;

import java.util.stream.Collectors;

/**
 * {@link EnableAutoConfiguration Auto-configuration} to render errors via a WebFlux
 * {@link org.springframework.web.server.WebExceptionHandler}.
 *
 * @author Brian Clozel
 * @author Scott Frederick
 * @since 2.0.0
 */
@Configuration
@EnableConfigurationProperties({ServerProperties.class, WebProperties.class})
public class GlobalErrorWebConfiguration {

    private final ServerProperties serverProperties;

    public GlobalErrorWebConfiguration(ServerProperties serverProperties) {
        this.serverProperties = serverProperties;
    }

    @Bean
    @Order(Ordered.HIGHEST_PRECEDENCE)
    public ErrorWebExceptionHandler errorWebExceptionHandler(ErrorAttributes errorAttributes, WebProperties webProperties, ObjectProvider<ViewResolver> viewResolvers, ServerCodecConfigurer serverCodecConfigurer, ApplicationContext applicationContext) {
        GlobalErrorWebExceptionHandler exceptionHandler = new GlobalErrorWebExceptionHandler(errorAttributes, webProperties.getResources(), this.serverProperties.getError(), applicationContext);
        exceptionHandler.setViewResolvers(viewResolvers.orderedStream().collect(Collectors.toList()));
        exceptionHandler.setMessageWriters(serverCodecConfigurer.getWriters());
        exceptionHandler.setMessageReaders(serverCodecConfigurer.getReaders());
        return exceptionHandler;
    }

    @Bean
    public DefaultErrorAttributes errorAttributes() {
        return new CustomizeErrorAttributes();
    }

}
